Thompson, 21, batted .254 with Class A Winston-Salem last season and led the Carolina League with 90 RBI while tying for first with 22 home runs. He also hit .280 in 14 games with AA Birmingham and .167 in 6 games with AAA Charlotte.

Sanchez, 20, is rated as the White Sox' No. 3 prospect after batting a combined .323 at Winston-Salem, Birmingham and Charlotte last year.

Johnson, 23, is the No. 4 prospect. A second-round draft pick in 2011 after a standout collegiate career at Cal-Berkley, Johnson was 6-5 with a 2.34 ERA in 17 combined starts for Winston-Salem and A Kannapolis in 2012.

Walker, 22, is the Sox' No. 5 prospect. He batted .267 and stole 56 bases in 111 games with Winston-Salem and Kannapolis last season.

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